ES2684680T3 - Belt lift system that has connection devices attached to it - Google Patents

Abstract

Assembly comprising (a) a strap (12), including a plurality of cables (42) extending longitudinally along the belt (12) with spaces between them, and includes a sheath (46) of the cables (42) extending into the spaces (44) between the cables (42), wherein said strap (12) is configured for use in an elevator system (2) as a suspension strap (12) for a car (4) and for a counterweight (6), or is configured for use in an elevator system (2) as a transmission belt (12) for a car (4) or for a counterweight (6), or is configured for use in an elevator system (2) as a combined transmission and suspension belt (12) for a car (4) and a counterweight (6); (b) a first connection device (32) including a first number of cable contact elements (50) that provide contact element-cable electrical connections; and (c) a second connection device (64), including a second number of cable contact elements (50, 50a) that provide contact element-cable electrical connections, and including at least two elements (70) conductors, each electrically connected to a respective one of the cable contact elements (50a), wherein the conductive elements (70) are provided to make electrical connections to a belt control unit (30) that monitors the proper condition of the cables (42) based on electrical signals passed through the cables (42); characterized in that (d) at least one of the first and second connection devices (32, 64) includes at least one element (50) in contact with the cable, of the bridge type, which extends into the space (44 ) between two cables (42) and provides electrical connection to both cables (42), thereby electrically connecting the two cables (42).

Description

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description

Belt lift system that has connection devices attached to it

The invention relates to an assembly comprising a belt, configured for use in an elevator system such as a suspension belt for a cabin and a counterweight, or configured for use in an elevator system such as a transmission belt for a cabin or counterweight, or configured for use in an elevator system such as a combined suspension and transmission belt for a cabin and a counterweight, and at least one connection device attached to the belt.

In many cases, modern elevator systems are equipped with straps that have wire cables incorporated therein into a sheathing (instead of uncoated round cables that comprise wires), which suspend or operate or suspend and operate an elevator car and a counterweight. If the belt has a drive or transmission function, that is, it transmits the forces required to move the cabin and the counterweight up and down, the design of the elevator system is often one in which the belt passes over a pulley drive.

During the operation of an elevator system, the wires inside a respective cable make slight movements relative to each other, in particular when the belt passes on a pulley or on a deflection roller, so that it bends and subsequently stretched back to a straight line configuration. During long periods of operating time, the relative movements of the wires result in a type of wear called "friction or rubbing wear". In addition, individual wires may break due to fatigue after long periods of operating time, especially when they are weakened by friction wear.

The manufacturers of elevator systems install belts that must meet strict specifications related to the maximum tension force that they can transmit without risk of failure. The cables have a maximum nominal tensile strength and, typically, the maximum permissible load is specified as the maximum tensile strength divided by a safety factor of typically 12 or 16. Due to the high safety factor, the belts are far away. of any risk of failure, even if a certain amount of friction wear has occurred, or if a certain percentage of the wires in the cables have been broken or even if one of the plurality of cables in the belt has been broken after of the use of the belt for a considerable time. However, belts that have friction wear greater than a tolerable amount of wear or that have a higher percentage of broken wires than allowed in the cables should be replaced by new belts.

The supervision of the belts in elevator systems is known to determine the deterioration of the mechanical resistance, in particular, resulting from friction wear on the wires and / or the broken wires. A common way of supervision comprises the transmission of an electrical signal (pulse or pulses, or a current flowing over a longer period of time) through the cables and the determination and analysis of the transmitted signal. For example, the amplitude or other changes of the transmitted signal compared to the original signal or with a reference signal stored in a belt monitoring unit, is an indication of a change in the cables. As an example, the electrical resistance of the cables could be monitored to detect changes in the cables.

The connection of one or more belt connection devices is known, in which the respective connection device comprises contact elements with the cable that provide an electrical connection between the respective contact element and a cable in the belt. Based on said electrical connection, it is possible, for example, to introduce or output electrical signals to or from the respective cable. Depending on the design of the connection device and the way of monitoring the belt, it is also known to provide an external cable connection between two contact elements with the cable, so that it is possible to short-circuit two cables.

Known belt and connection device assemblies comprise a connection device that includes a first part, a second part and screws that hold the two parts together with a section of the belt between them (WO 2005/094248 A2, WO 2005 / 094249 A2). The contact elements with the cable are pins with sharp points positioned in locations facing the central part of the respective cables, when the section of the belt is properly placed in the connecting device. By turning the screws, the two parts of the connecting device move to bring them closer together, so that the actuation points of the contact elements with the cable pierce through the belt lining and in the central parts (with respect to the widths) of the respective cables. Relatively high forces are required to force the tips of all the respective cable contact elements in place, all at the same time. The provision of cables to connect two contact elements with the cable to short-circuit two cables complicates the connection device.

An object of the invention is an assembly comprising

(a) a belt, which includes a plurality of wire cables that extend longitudinally along the

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belt with spaces between them, and includes a lining of the cables that extends to the spaces between the cables, in which said belt is configured for use in an elevator system such as a suspension belt for a cabin and a counterweight , or is configured for use in an elevator system such as a transmission belt for a cabin or for a counterweight, or is configured for use in an elevator system such as a suspension and combined transmission belt for a cabin and a counterweight;

(b) a first connection device that includes a first number of contact elements with the cable that provide electrical connections contact element-to-cable; Y

(c) a second connection device, which includes a second number of contact elements with the cable that provide electrical connections cable-to-cable element, and that include at least two conductive elements, in which each is electrically connected to an element between the respective cable contact elements, in which the conductive elements are provided to make electrical connections to a belt monitoring unit that monitors the correct state of the cables based on the electrical signals passed through of the cables;

(d) in which at least one of the first and second connection devices includes at least one contact element with the bridge-type cable, which extends into the space between two cables and provides an electrical connection to both cables , thus electrically connecting the two cables.

Another object of the invention is a method of assembling a belt connection device, which includes a plurality of wire cables that extend longitudinally along the belt with spaces between them and includes a cable sheath that it extends into the spaces between the cables, in which said belt is configured for use in an elevator system such as a suspension belt for a cabin and a counterweight, or is configured for use in an elevator system such as a transmission belt for a cabin or for a counterweight, or is configured for use in an elevator system such as a suspension and combined transmission belt for a cabin and a counterweight;

wherein said connection device includes a groove that extends as an open conduit through the connection device, or that has, at an extreme part thereof, a stop part for the belt associated with the groove;

and wherein said connection device includes at least one hole and a screw that engages a wall of the hole, in which the hole has an axis through the groove;

wherein said method comprises placing a section of said belt in said groove and rotating said at least one screw, so that a part of the screw is forced into one of the spaces between two cables in contact with the two cables, providing in this way an electrical connection between the two cables.

The invention provides a connection device, designed for use attached to the belt of an elevator system, which can be mounted to the belt more easily than the prior art connection devices described above.

The invention further provides a connection device, designed for use attached to the belt of an elevator system, which produces in a simple manner a well-defined electrical connection between the contact element with the respective cable and a cable.

The invention further provides a connection device, designed for use attached to the belt of an elevator system, which facilitates the establishment of a short-circuit connection between two wires in the straps.

The invention will be further elucidated by means of non-limiting embodiments and by means of drawings showing those embodiments.

Fig. 1 is an elevation view and schematically illustrates an elevator system in an elevator shaft.

Fig. 2 is a perspective view and illustrates a connection device of a type designated as "first connection device" in the present application;

Fig. 3 is a plan view of the connection device shown in Fig. 2;

Fig. 4 is a sectional view, taken along the line IV-IV in Fig. 3;

Fig. 5 is a sectional view taken along the line IV-IV in Fig. 3, and illustrates a situation in which the elements of contact with the cable have been placed in use positions;

Fig. 6 is a perspective view and illustrates a connection device of a type designated as "second device of

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connection "in this application;

Fig. 7 is a plan view of the connection device shown in Fig. 6;

Fig. 8 is a sectional view, taken along the VNI-VIII line in Fig. 7;

Fig. 9 is a sectional view taken along line VIII-VIII in Fig. 7, and illustrates a situation in which the elements of contact with the cable have been brought to use positions;

Fig. 10 is an elevation view and schematically illustrates a situation in which the second connection device of Figs. 6 to 9 has been assembled with a belt monitoring unit.

Fig. 1 shows the following main mechanical components of an elevator system 2: passenger cabin 4, counterweight 6, drive pulley 8 driven by an electric drive motor 10 (located behind the drawing plane), and a belt 12 between a plurality of belts (typically two or three or four belts) that are located in a parallel relationship, one behind the other (with a certain distance between them) when they progress in a direction perpendicular to the plane of the drawing. In a first end section of the respective belt 12, the belt 12 is fixed to a first termination device 14. In a second end section, the respective belt 12 is fixed to a second termination device 16. In one embodiment, the termination devices 14 and 16 have a wedge clamp construction as is known in the art.

An additional mechanical component of the elevator system 2 or a first pair of guides for the passenger cabin 4, and a second pair of guides for the counterweight 6, as is well known in the art. In order not to diminish the clarity of Fig. 1, those guides are not shown in Fig. 1. The complete elevator system 2 is positioned inside an elevator shaft 18 that typically has a rectangular horizontal cross-section. and it is located inside a building. In one embodiment, the guides not shown are supported, with their lower ends, on a floor 20 of the elevator shaft 18 and each is connected with clamps (not shown), mutually separated, to the respective walls of the elevator shaft 18, in order to prevent the guides from warping or buckling. The electric motor 10, for example, with the drive pulleys 8 mounted on the motor shaft or formed by the motor shaft, rests directly or indirectly on one or a plurality of the guides. In another embodiment, the motor 10 is mounted to at least one wall or to a ceiling of the elevator shaft 18. The indications regarding the assembly of the motor 10 also apply to the assembly of the termination devices 14 and 16. It should be noted that, in further embodiments, the elevator system 2 is not positioned in a surrounding elevator shaft 18, but of the panoramic elevator type, and / or the elevator system 2 is an elevator system for transporting cargo, in place for passenger transport.

The belt 12 shown in Fig. 1 descends from the first termination device 14 to a deflector roller 22 mounted on the counterweight 6, then rises to the respective drive pulley 8, then descends to a first deflector roller 24 mounted in the passenger cabin 4, then extends horizontally to a second deflector roller 26 mounted in the passenger cabin 4, and finally climbs up to the second termination device 16. The same applies to the second (if provided) and the third (if provided) and the fourth (if provided) etc., belt 12, each belt 12 having "its own" first termination device 14, roller 22 deflector, drive pulley 8, roller 24 deflector, roller 26 deflector and second termination device 16. However, it should be noted that there are other embodiments in which a unitary rotating element performs the same function as multiple adjacent drive pulleys, for example, in the manner in which a part of the motor shaft 10 forms two or three or four parts of drive pulley, side by side, with adequate distance between them.

Fig. 1 further shows a belt monitoring unit 30, directly or indirectly mounted to a wall of the elevator shaft 18 or one or more guides. In addition, Fig. 1 shows a connection device 32 of the type "first connection device" and an additional connection device 64 of the type "second connection device". Both connecting devices 32 and 64 are fixed to the belt 12 in those parts of the respective end section of the belt, which are located backwards from the respective termination device 14 or 16, that is, those parts that are not under the traction force to suspend the passenger cabin 4 and the counterweight 6.

The type of suspension of the cab 4 and the counterweight 6 described is known in the art and is called a 2: 1 suspension. It should be noted that the invention can be practiced in combination with all known suspension types.

Figs. 2 to 5 show the first connection device 32 as fixed to a part of the belt 12. The belt 12 terminates at a distance from that front end 36 of the first connection device 32, which is oriented towards the observer of Fig. 2 , or ends inside the first connection device 32 between said front end 36 and the screws 50 which will be described below. The belt 12 leaves from the opposite rear end 38 of the first connection device 32 and is then cut at 40 for the purpose of preparing the drawing of Fig. 2. Fig. 1 shows that, in reality, the belt 12 continues to the inside the first termination device 14 and, subsequently, for its additional trajectory as described above.

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In the illustrated embodiment, the belt includes ten cables 42, designated with the letters a, b, c, d, e, f, g, h, I, k. Each cable 42 includes a central filament and six strands twisted around the central filament. Each filament consists of a central wire and six twisted wires around the central wire. The wires are stretched wires made of high strength steel. Typical dimensions are 1.5 to 3.5 mm in cable diameter and 0.12 to 0.4 mm in wire diameter in the embodiment shown. Each time between two adjacent cables 42, there are spaces 44 of a size somewhat smaller than the diameter of the cable. In alternative embodiments, the spaces 44 are larger than the diameter of the cable or have a width equal to the diameter of the cable. The cables 42 are included in a coating material 46, typically synthetic rubber or polyurethane, which also fills the spaces 44 between the cables 42. What is indicated in this paragraph refers to the illustrated embodiment. Other embodiments of the invention have cables of other designs and / or other sizes of their components and / or other materials and / or a different number of cables 42. Typically, the belt 12 has a maximum tensile strength in the range of 30 to 100 kN In a further embodiment of the invention, the belt 12 does not have two flat surfaces (a flat upper surface 48 can be seen in Fig. 2), but a series of longitudinal ribs provided in parallel on one of those surfaces. In this case, the wall of the first connection device 32, which is in contact with the grooved side of the belt 12, is provided with grooves that extend longitudinally to accommodate the ribs.

As best seen in Figs. 2 and 3, the first connection device 32 includes five contact elements 50 with the cable, which are screws, each with a screw head 52, a rod 54 and a conical tip 56. Each screw 50 cooperates with a respective hole 58 in the first connection device 32, in which the hole comprises a first section (having a diameter larger than the second and third sections), a second section above the belt 12 (which it has a diameter slightly smaller than the screw 50), and a third section under the belt 12 (which has the same diameter as the second section). In the situation shown in Fig. 4 (screws 50 partially screwed in the first connection device 32), a lower part of the rod 54 of the respective screw 50 is positioned in the second section of the hole 58, while the rest of the rod 54 and the main part of the screw head 52 is positioned in the first section of the hole 58. Each hole 58, which includes its first section having a larger diameter, extends through the first connecting device 32 from its upper side to its bottom side (considering the orientation of the first connection device 32 shown in Fig. 2). A slot 60 extends horizontally (in the orientation shown in Fig. 2) through the first connection device 32 from its front end 36 to its rear end 38. The groove 60 has a shape and size so that it accommodates the belt 12 with a certain amount of slack, but not much. In the present embodiment, as illustrated in Figs. 2 to 5, the screws 50, when screwed into the respective hole 58 from the initial position of Fig. 4 to the final position of Fig. 5, each acts as a short circuit (making a direct electrical connection) between two adjacent cables 42. As best seen in Fig. 4 in combination with Figs. 2 and 3, screws 5 make direct electrical connections between wires a and b, c and d, e and f, g and h and i and k. The displacement of each of the screws 50 to their lowest use position (shown in Fig. 5) is a simple operation that does not require much effort, because the sharp tip 56 of the screw is easily forced into the space between the respective two adjacent cables 42, even more so when each "short-circuit bridge" is placed individually to its position of use (shown in Fig. 5), instead of the five contact elements with the cable at the same time by turning two screws which act on a clamp type upper part of the connection device.

Said first section of each hole 58 may serve to hold an end portion of a screwdriver, used to rotate the screws 50, in place to prevent an involuntary exit from the hole 58.

Except for the screws 50, the first connection device 32 is a unitary element produced from plastic material by injection molding. In the post injection molding state, the holes 58 do not have female threads in their walls. On the contrary, each time the rod 54, provided with male screw threads, of the respective screw 50, forces / deforms the plastic material to a female thread configuration, when it is screwed into the second section of the respective hole 58 from the beginning halfway from the down position shown in Fig. 4.

Each time, the rod 54 of the respective screw 50 has a diameter that is sufficiently larger than the space between two adjacent cables 42. This ensures that the rod 54 actually makes direct electrical contact with the two wires 42. The tip part 56 may have male screw threads or not. In the same manner as described for the second section of the respective hole 58, each time the rod 54 of the respective screw 50 "is screwed" into the third section under the belt 12 of the respective hole 58, see Fig. 5. In this situation, the respective rod 54 with its male screw threads has been worked between the two respective cables 42, thus ensuring that the sheathing material 46 has been removed at that point and that a perfect electrical contact has been established. Thus, the five screws 50 are contact elements with the bridge-type cable In the extreme position of use shown in Fig. 5, the lower surface of the respective screw head 52 is supported against a flange 60 of the hole 58 respective.

Figs. 2 and 3 show that screws 50 and holes 58 are not arranged in a straight line, but in an arrangement displaced in two lines. This results in a very compact arrangement.

Now, reference is made to the connection device 64 illustrated in Figs. 6 to 9, which is of the type designated as "second

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connection device "in the present application. The differences of the second connection device 64 in comparison to the first connection device 32 will first be described:

A first difference is that the second connection device 64 does not have an "open" slot that extends from one end to the other end of the connection device, as was the case with the slot 60 in the first connection device 32. On the contrary, there is a deep box-shaped recess 66 that ends in an end wall 68, whose inner face is shown by a dashed line in Fig. 7. In addition to the end wall 68, the recess 66 has a shape and a cross-sectional size that are similar to those of the slot 60. When the second connecting device 64 has been fixed to the belt 12, an end part of the belt is positioned in the recess 66, with the end face of the belt 12 leaning against the extreme wall 68. The recess 66 accommodates the end part of the belt 12 with a small clearance. The end wall 68 acts as a stop part of the second connection device 64, and it is not required for its function that the stop part completely close the slot 60. In an alternative embodiment, the slot 60 extends as a completely open conduit through the second connection device 64, in the same manner as shown and described in connection with the first connection device 32.

As a second difference, the second connection device 64 includes six holes 58 and six contact elements with the screw-shaped cable. Four of these screws have been given the reference number 50 as in the first connection device 32. These screws 50 have a function analogous to the function in the first connection device 32, that is, they provide short circuits (make direct electrical connections) between the wires i and h, g and f, e and d and c and b. These screws 50 are screwed into the spaces between the two respective adjacent cables 42 in the same manner as in the first connection device 32 (but short-circuiting other "pairs" of cables 42). In this way, these four screws 50 are contact elements with the bridge-type cable.

As a third difference, the second connection device 64 includes two screws 50a, which are positioned in the second connection device 64 so that the axis of a screw 50a substantially intersects the center line of the cable a (which is the cable plus close to a first side edge of the belt 12), and that the axis of the other screw 50a substantially intersects the center line of the cable k (which is the cable closest to the other side edge of the belt 12). Thus, once these screws 50a, starting from the situation shown in Fig. 8, are screwed more deeply into the second connection device 64, the cables a and k respectively penetrate or pierce respectively. Fig. 9 shows the fully threaded end position of the screws 50a, in which a lower end portion of the respective rod 54 has been screwed into the third section of the respective hole 58 under the belt 12. Thus, each Screw 50a provides an electrical connection to only one of the wires a and k. The screws 50a have the same design as the screws 50 described above, but due to their specific positions in the second connection device 64 they have a function, as described, which is different from the function of the other screws 50. In An alternative embodiment, at least one of the screws 50a has its axis displaced from the center line of the cable 42, in a position between said center line and the side of the cable 42 closest to the edge of the belt 12.

As a fourth difference, the two screws 50a and one screw 50 are arranged in a line that extends perpendicular to the longitudinal direction of the belt 12; two other screws 50 are arranged in a second line, which extends parallel to the first line described in a certain distance; the fourth screw 50 is positioned midway between those two lines.

As a fifth difference, the second connection device 64 includes two conductive elements 70, each of which has a first part 72 housed in a respective recess, and a bifurcated second part 74 protruding from a rear end face 76 of the second device 64 connection. The rear end face 76 is opposite the front end face 78 where the belt 12 has been inserted into the recess 66. Each second part 74 is surrounded by a protective wall 75 having a cross section with a rectangular configuration.

Apart from the differences described, the second connection device 64 has a construction quite similar to that of the first connection device 32. However, it should be noted that the second connection device 64 is somewhat larger than the first connection device 32 (measured in the longitudinal direction of the belt 12) and that the second connection device 64 has two projecting ribs 80, one that protrudes from one side face and the other protrudes from the other side face 82 of the second connection device 64. Both ribs 80 are in a common plane, which, in the present embodiment, substantially coincides with the plane of the belt 12.

Each screw 50a penetrates through a respective round opening in the first part 72 of the respective conductive element 70. In the state as manufactured, the respective opening has a smaller diameter than the rod 54 of the respective screw 50a. When the screw 50a is screwed, with part of its length, through the respective opening, a female screw thread is formed in the wall of the opening, so that a perfect electrical connection is established between the conductive element 70 and the 50th screw The conductive elements 70 are stamped from plate-shaped metal.

As shown in Figs. 2 to 9, the axes of all holes 58 and all screws 50 and 50a are perpendicular to the plane (it should be understood as a plane arranged through the belt 12 halfway between the upper surface and the

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lower surface of the belt 12). In another embodiment, the angle is somewhat greater or less than 90 °.

As best seen in Fig. 1, the "free" end section of the belt 12 (which exits from the second termination device 16 and which is not subjected to tension loading from the cabin 4 and the counterweight 6) is sufficiently long enough to extend to the belt monitoring unit 30. The first indicated end section that exits from the second termination device 16 has its final end portion inserted in the second connection device 64, as shown in Figs. 6 and 7. Once the screws 50 and 50a are screwed into their position of use, the second connection device is connected to the belt monitoring unit 30. Fig. 10 illustrates that the belt monitoring unit 30 comprises a printed circuit board 84 and a housing 86 comprising a lower part 86a of the housing and an upper part 86b of the housing. In the housing 86, a connection device 88 is provided which is fixed to the lower part 86a of the housing and / or to the printed circuit board 84 and is electrically connected to the conductors in the printed circuit board 84. The second connection unit 64 has been pushed in the direction of the arrow 90, so that the second parts 74 of the conductive elements 70 are inserted into the female connectors in the connection device 88. The lower wall of the second connection device 64 comprises rectangular openings 92, in which the projections provided in the lower part 86a of the housing are snapped in order to allow a preliminary fixation of the second connection device 64 to the housing 86. The final fixation of the second connection device 64 to the belt monitoring unit 30 has been subsequently carried out by means of a support 94, fixed to the lower part 86a of the housing by means of screws 96 positioned in front of and behind the drawing plane . The support 94 is located in close proximity or even touching the second connection device 64. The support 94 presses on the belt and provides "tension relief", that is, the tensile forces exerted on the end section of the belt 12 are not transmitted to the second connecting device 64. The support 94 also has the function of directly holding the second connection device 64 in place.

Each of the ribs 80 shown in Figs. 6 to 9 of the second connection device 64 is positioned in a corresponding slot provided in the lower part 86b of the housing. In an alternative embodiment, the lower face and / or the upper face of each nerve is coupled to a nerve provided in the lower part 86b of the housing. In this manner, the ribs 80 serve to ensure proper positioning of the second connection device 64 in the lower part 86b of the housing and serve as an (additional) instrument to prevent the involuntary movement of the second connection device 64 in the opposite direction. to that of arrow 90.

The belt monitoring unit 30 is connected to a voltage source and comprises the circuitry from which the electrical signals are supplied to one of the conductive elements 70. As is evident from the drawings and the description above, all wires a to k are connected in a single serial connection. The response to the signals supplied to one of the conductive elements 70 is emitted from the other conductive element 70 to the circuitry on the printed circuit board 84. The response signals are evaluated. A significant distinction in relation to the input signal or a significant distinction in relation to a model response signal stored in the belt monitoring unit 30, shows that there has been a certain degree of wear in at least one location in the totality of the cables 42. The belt monitoring unit 30 may comprise circuitry and / or software to distinguish between a tolerable degree of wear and a non-tolerable degree of wear.

In an alternative embodiment, each of the second parts 74 is configured as a female connect and each connecting device 88 is configured as a male connect.

In the embodiment described above, all of the ten cables 42 are connected in a single serial connection. Other embodiments are possible, for example, which provide a first group of cables a, b, c, d, which are connected in a first series connection, and a second group of cables e, f, g, h, i, k , which are connected in a second serial connection. Four 50a non-bridge type screws and four conductive elements would be provided. The belt monitoring unit 30 would be designed to monitor each of the two serial connections to determine the wear of the cables 42 therein. In another embodiment, the number of cables 42 and the number of contact elements with the cable are greater or less than in the illustrated embodiment.

In an alternative embodiment, not all the contact elements 50, 50a with the cable are positioned on one side of the belt 12 (as was the case in Figs. 2 to 9), but part of them in a device of connection are positioned on one side of the belt 12, while the rest thereof in the connection device are positioned on the opposite side of the belt 12. It is possible, especially in said embodiment, to arrange all the contact elements with the cable in a single row.

In an alternative embodiment, the holes 58 are designed differently from that of the drawings and that of the description provided above. One option is not to form female screw threads in the second and third sections of the respective hole 58, but to design the hole arrangement as a template for inserting the contact elements with the cable into appropriate locations in the belt 12. In this case, the elements of contact with the cable could be screws (this time not in a threaded coupling with the wall of the hole 58) screwed into the belt 12 or even nail-like elements pushed into the belt by an instrument similar to a caliber.

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Belt monitoring units that introduce signals to cables in a belt of an elevator system and evaluate response signals to determine belt wear are known in the art, for example, from WO 2005 documents / 095252 Al and WO 2005/094248 A2. The belt monitoring units of said design are suitable for use in connection with the invention, and belt supervision units of another design can also be used.

A further object of the invention is a per se connection device, as described in the present application. The connection device is configured to be attached to a belt (which has cables included in a lining material) configured to be used in an elevator system. The connection device comprises contact elements with the cable, screws in one embodiment. Each of the contact elements with the cable may be positioned and designed as a contact element with the bridge type cable, or positioned and designed as a contact element with the non-bridge type cable that provides electrical connection to a cable only In the embodiment referred to in this paragraph of the application, one or a plurality of contact elements with the bridge-type cable are not a mandatory feature of the invention. This embodiment may comprise one or more different features described in the present application. The embodiment may be such that the individual cables, or the individual cable pairs 15, or any multiple of cables, or any multiple of cable pairs are connected to the belt monitoring unit 30 and are monitored individually or in groups of more of a cable.

Claims (14)

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Set comprising (a) a belt (12), which includes a plurality of cables (42) extending longitudinally along the belt (12) with spaces between them, and includes a sheath (46) of the cables (42) which extends into the spaces (44) between the cables (42), wherein said belt (12) is configured for use in an elevator system (2) as a suspension belt (12) for a cabin (4) and for a counterweight (6), or is configured for use in an elevator system (2) as a transmission belt (12) for a cabin (4) or for a counterweight (6), or is configured for use in an elevator system (2) such as a combined suspension and transmission belt (12) for a cabin (4) and a counterweight (6); (b) a first connection device (32) that includes a first number of contact elements (50) with the cable that provide electrical connections contact element-cable; Y (c) a second connection device (64), which includes a second number of contact elements (50, 50a) with the cable that provide electrical connections contact element-cable, and that include at least two conductive elements (70) , each electrically connected to a respective element between the contact elements (50a) with the cable, in which the conductive elements (70) are provided to make electrical connections to a belt control unit (30) that monitors the proper condition of the cables (42) based on electrical signals passed through the cables (42); characterized by that (d) at least one of the first and second connection devices (32, 64) includes at least one contact element (50) with the bridge-type cable, which extends into the space (44) between two cables (42) and provides electrical connection to both cables (42), thereby electrically connecting the two cables (42). 2. Assembly according to claim 1, wherein said at least one element (50, 50a) of contact with the cable is a screw having a rod part (54) that is coupled to a wall of a hole (58) in the device (32, 64) of connection and having an extreme part (56) where the cross-sectional area of the screw is gradually reduced. 3. Assembly according to claim 2, in which at least part of the end part has a male screw thread. 4. Assembly according to claim 2 or 3, wherein said wall of said hole (58) has a female screw thread, formed by the screw turned to mount it in the connection device (32, 64). 5. Assembly according to any one of claims 2 to 4, wherein said hole (58) has at least two sections with a space between them, and in which a section of said belt (12) is located in said space. 6. Assembly according to any one of claims 1 to 5, wherein at least one of said conductive elements (70) is penetrated by a screw pin (50a), providing an electrical connection with a single cable (42). 7. Assembly according to claim 6, wherein said screw pin (50a) has a rod portion (54) that engages a wall of a hole (58) in the connecting device (64), and has an end portion where the cross-sectional area of the screw pin (50a) is gradually reduced, wherein said screw pin (50a) is positioned in the connecting device (64) so that it penetrates the respective cable (42) substantially in a central part of its width . 8. Assembly according to any one of claims 1 to 7, wherein each of the first and second connection devices (32, 64) includes a plurality of contact elements (50, 50a) with the cable, each of which extends into a space (44). 9 5 10 fifteen twenty 25 30 35 40 Four. Five between two wires (42) and provides electrical connections to these two wires (42). 9. Assembly according to claim 8, wherein the number of cables (42) in the belt (12) is 2n, the first number of contact elements (50) with the bridge-type cable, in the first connection device (32) is n, the second number of contact elements (50) with the cable, of the bridge type, in the second connection device (64) is n-1, and the number of conductive elements (70) in the second connection device (64) is 2, in which all the cables (42) in the belt (12) are connected in a serial electrical connection by means of said contact elements (50, 50a) with the cable and in which said assembly is configured so it is possible to make the electrical connections between the assembly and said belt monitoring unit (30) only through the second connection device (64). 10. Assembly according to any of claims 1 to 9, wherein said assembly is electrically connected to said belt monitoring unit (30), comprising a housing (86), a printed circuit board (84) and a connector (88) fixed to the housing (86) and / or to the printed circuit board (84) and electrically connected to the printed circuit board (84); and wherein said second connection device (64) is electrically connected by a connection with said connector (88). 11. Assembly according to claim 10, wherein a belt section adjacent to the second connection device (64) is fixed to said housing (86) by means of a fixing support. 12. Assembly procedure of a device (32, 64) for connection to a belt (12), which includes a plurality of wire cables (42) extending longitudinally along the belt (12) with spaces (44 ) between them and includes a lining (46) of the cables (42) that extends into the spaces (44) between the cables (42), wherein said belt (12) is configured for use in a elevator system (2) as a suspension belt (12) for a cabin (4) and a counterweight (6), or is configured for use in an elevator system (2) as a transmission belt (12) for a cabin (4) or for a counterweight (6), or is configured for use in an elevator system (2) as a combined suspension and transmission belt (12) for a cabin (4) and a counterweight (6 ); wherein said connection device (32, 64) includes a slot (60) that extends as an open conduit through the connection device (32), or has, at an end part thereof, a part (68) of stop for the belt (12) associated with the groove (60), and wherein said connecting device (32, 64) includes at least one hole (58) and a screw (50, 50a) that is coupled to a wall of the hole (58), wherein the hole (58) has an axis passing through the groove (60); characterized by said method comprises placing a section of said belt (12) in said groove (60) and turning said at least one screw (50, 50a), so that a part of the screw (50, 50a) one of the spaces (44) between two cables (42) is forced into the interior in contact with the two cables (42), thus providing an electrical connection between the two cables (42). 13. A method according to claim 12, wherein a first connection device (32) having a plurality of first screws (50) is mounted, so that parts of each of said first screws (50) each time provide a electrical connection between a pair of cables (42) respective; and in which a second connection device (64) having a plurality of first screws (50) and two second screws (50a) is mounted, so that parts of each of said first screws (50) each time provide a electrical connection between a respective pair of cables (42) and parts of each of said second screws (50a) each time provide an electrical connection between only one cable (42) and the second screw (50a). 14. A method according to claim 13, wherein the electrical connections are made between said second screws (50a) and a belt monitoring unit (30), thus establishing a circuit that includes all cables (42) in an electrical connection in series and a component of the belt monitoring unit (30).